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Synthesis of polyvinyl chloride modified magnetic hydrochar for effective removal of Pb(II) and bisphenol A from aqueous phase: performance and mechanism exploration

Carbon Research 2025 26 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 63 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Fuxuan Bi, Lei Wang, Bo Zhang, Xiaoyang Liu, Qi Hu, Mingyao Ma, Mingyao Ma, Lei Wang, Lei Wang, Ying Zhang Qi Hu, Lei Wang, Qi Hu, Ying Zhang Ying Zhang Mengning Wang, Ying Zhang Mengning Wang, Lei Wang, Lei Wang, Jianhua Qu, Ying Zhang Jianhua Qu, Ying Zhang

Summary

Scientists created a new material by combining PVC plastic waste with corn straw and iron oxide to make a magnetic filter that can remove lead and bisphenol A from water. The material worked well across a wide range of water conditions and could be reused multiple times. While focused on water cleanup technology, this research shows how recycled plastic waste can be repurposed to help address water contamination, including pollutants often associated with microplastics.

Polymers

PVC

Study Type Environmental

Abstract To effectively remove lead (Pb(II)) and bisphenol A (BPA) from wastewater, polyvinyl chloride modified magnetic hydrochar (PVC-AMHC) was synthesized through co-hydrothermal carbonization of polyvinyl chloride and corn straw, and subsequently activated using NaOH. Characterization demonstrated that both PVC and NaOH activation increased the content of oxygen-containing functional groups, and Fe 3 O 4 was successfully loaded onto the material surface. Furthermore, PVC-AMHC displayed remarkable uptake capacity with the maximum uptake amount of Pb(II) (217.53 mg/g) and BPA (185.53 mg/g) at 130 and 30 min, respectively, under a wide pH range. Additionally, PVC-AMHC possessed high tolerance to different interference cations and maintained excellent adsorption performance during four regeneration cycles. The thermodynamic analysis suggested that the absorption processes of Pb(II) and BPA by PVC-MHC were spontaneous (-Δ G 0 ) with an endothermic characteristic (+Δ H 0 ). Adsorption mechanisms of Pb(II) on PVC-AMHC included complexation, electrostatic attraction, and pore filling, and those of BPA were mainly associated with hydrogen bonding and pore filling. In conclusion, PVC-AMHC was an environmentally friendly adsorbent with effectively simultaneous removal of Pb(II) and BPA from wastewater. Graphical Abstract

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